Magic compass

Patent 7134213 Issued on November 14, 2006. Estimated Expiration Date:

January 28, 2025. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Angular displacement measuring apparatus
Patent #: 3950859
Issued on: 04/20/1976
Inventor: Kramer

Magnetic compass
Patent #: 4175333
Issued on: 11/27/1979
Inventor: Kramer

Recreational compass
Patent #: 4438568
Issued on: 03/27/1984
Inventor: Kramer , et al.

Earthquake detecting magnetometer with movable magnetic compass needle and method of using same
Patent #: 4980644
Issued on: 12/25/1990
Inventor: Todorov

Compass
Patent #: 5146687
Issued on: 09/15/1992
Inventor: Kjellstrom

Directional indicator
Patent #: 5367781
Issued on: 11/29/1994
Inventor: Hsu

Ghebleh bearing indicator
Patent #: 5546310
Issued on: 08/13/1996
Inventor: Ehdaie, et al.

Watch comprising an arrangement for indicating a predetermined geographic locality
Patent #: 5721713
Issued on: 02/24/1998
Inventor: Bornand

Compass device with light attenuating mask
Patent #: 5755036
Issued on: 05/26/1998
Inventor: Lewis

Portable precision clock with additonal functions Patent #: 5790477
Issued on: 08/04/1998
Inventor: Hauke

Inventor

Ashin, Mark Alan

Application

No. 11044823 filed on 01/28/2005

US Classes:

33/355R, Magnetic field responsive33/349, With preselected direction indicator33/361, Electro-magnet or inductor (e.g., flux valve, etc.)33/1CC, Remote point locating33/352, Includes magnetic compass33/344, With damper or governor for sensor33/348, With viewing aid (i.e., illuminator or illumination director)324/345By magnetic means

Examiners

Primary: Guadalupe, Yaritza

Foreign Patent References

607904 CH 04/01/1978
613832 CH 10/01/1979
3412777 DE 10/01/1985
60814 EP 09/01/1982

International Class

G01C 17/28

Abstract

A magic compass that gives the illusion it defies the laws of nature, providing usage as an aid for locating the direction of prayer as well as a novel promotional device for companies, having a magnetized compass needle (16) which is attached via a linking means to a non-magnetic pointer (22). This linking means, which can be rigid (11) or non-rigid (29), allows the non-magnetic pointer (22) to be angularly displaced from the magnetized compass needle (16). This linkage also provides the means for the non-magnetic pointer (22) to rotate and pivot freely via the inertia of the magnetized needle (16). A partition (20) hides the magnetized needle (16) below, and simultaneously creates a compass face for the non-magnetic pointer above. The non-magnetic pointer (22) is designed and shaped to appear identical to a true magnetized compass needle (32).